Microstructure evolution in a melt-spun amorphous Fe77.2Mo0.8Si9B13 alloy subjected to high-energy ball milling was investigated by means of X-ray diffraction (XRD), a transmission electron microscope (TEM), and a differential scanning calorimeter (DSC). It was found that during ball milling, crystallization occurs in the amorphous ribbon sample with precipitation of an alpha-Fe solid solution, and the amorphous sample crystallizes completely into a single alpha-Fe nanostructure (rather than alpha-Fe and borides as in the usual thermal crystallization products) when the milling time exceeds 135 hours. The volume fraction of material crystallized was found to be approximately proportional to the milling time. The fully crystallized sample with a single alpha-Fe nanophase exhibits an intrinsic thermal stability against phase separation upon annealing at high temperatures. The ball-milling effect on the subsequent thermal crystallization of the amorphous phase in an as-milled sample was studied by comparison of the crystallization products and kinetic parameters between the as-quenched amorphous sample and the as-milled partially crystallized samples. The crystallization temperatures and activation energies for the crystallization processes of the residual amorphous phase were considerably decreased due to ball milling, indicating that ball milling has a significant effect on the depression of thermal stability of the residual amorphous phase.
部门归属
guo, fq (reprint author), chinese acad sci,inst met res,state key lab rsa,shenyang 110015,peoples r china
F. Q. Guo,K. Lu. Ball-milling-induced crystallization and ball-milling effect on thermal crystallization kinetics in an amorphous FeMoSiB alloy[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,1997,28(5):1123-1131.
APA
F. Q. Guo,&K. Lu.(1997).Ball-milling-induced crystallization and ball-milling effect on thermal crystallization kinetics in an amorphous FeMoSiB alloy.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,28(5),1123-1131.
MLA
F. Q. Guo,et al."Ball-milling-induced crystallization and ball-milling effect on thermal crystallization kinetics in an amorphous FeMoSiB alloy".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 28.5(1997):1123-1131.
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